There are many places to search for quality resources. Below are some tools and collections that I have found useful that I was not aware of before setting out on this educational journal.

For finding Creative Commons licenced resources:

https://search.creativecommons.org/

For music and sound

Jamendo, CCMixter, Freesound,

For images

Trove – Australian images, 

Flickr,

Pixabay,

Open photo,

CSIRO Science images

NASA image gallery

For video

Engage Media – video with a social justice slant,